Improper locking in Linux kernel - CVE-2026-46304
Published: June 10, 2026
Vulnerability identifier: #VU134198
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46304
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in nvmet_ctrl_free when freeing a controller while processing nvmet-wq work items. A local user can trigger controller teardown to cause a denial of service.
The issue can lead to a possible recursive locking condition on the nvmet-wq workqueue during NVMe target controller teardown.
How to mitigate CVE-2026-46304
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/551f445a56a11a6457550cddcf39c9ebb8bcacc6
- https://git.kernel.org/stable/c/781f47d641432c26c19625b2cdd7f40825097592
- https://git.kernel.org/stable/c/8d66ba89480ff098a58d79003a505f383aa4e920
- https://git.kernel.org/stable/c/9a4d7222c0955b221e38bb66d10e6bccb672c8a1
- https://git.kernel.org/stable/c/a696fbbd5240b4ac9b166f7bd4c550882ff543f1
- https://git.kernel.org/stable/c/aade8abd8b868b6ffa9697aadaea28ec7f65bee6
- https://git.kernel.org/stable/c/ae5b0cad163833e10b271e9becc05d81dae56e5f
- https://git.kernel.org/stable/c/ee6e20c4bc9eae542a0954a368449532383169d4